Being under debt review should not affect your ability to be employed since the process is treated as confidential. There are certain professions like financial advisers and people working in the banking sector that might have some questions to ask but we can confirm that it has become less and less of an issue.

You most certainly can pay extra, but not directly to the stores, it is very important that the payments are done through the PDA (Payment Distribution Agency). So let your debt counsellor know about the extra payment so that the repayments can be allocated correctly and that your debt review admin stays on track.